Now a lot of promising altcoins appear. One of the most promising direction to use altcoins is gaming. Cryptocurrency allows a lot of opportunities for gamers, here is an article about some of them https://medium.com/e-money-com/defi-gaming-platform-elfin-kingdom-to-explore-e-moneys-suite-of-stablecoins-616e66e8bf73
Gaming industry is very big and prospective industry with a lot of users. It is growing fast. That is why many cryptocurrency projects offer a products on blockchain.
NFT is now actively used in gaming. They attract a lot of attention and allows to earn more money. That is why NFT in gaming is very popular.
The popularity isn't really because of the developed gameplay but due to the certainty of steady income its giving. NFT undoubtedly is one of the top ways to make million bucks in crypto nowadays.